[EMSUSD-3031] maya-usd exported with arnold

[wandth]

Describe the bug
When I first used mayaUSDExport to export usd with arnold shader, the usd file he exported was not what I expected. How should I export usd correctly

usdFilePath = r"C:\Users\1049\Desktop\test\usd\test\c.usda"
cmds.select("group1")
cmds.mayaUSDExport(
    mergeTransformAndShape=True, 
    file=usdFilePath,
    selection=True,
    shadingMode='useRegistry',
    jobContext = ["Arnold"],
    exportMaterials=True,
    materialsScopeName='mtl'
)

that was my exported code

that was my scene

Specs (if applicable):

• OS & version Windows 10
• Maya version maya2025
• Arnold MtoA 5.4.7.1
• Maya-USD 0.32.0

[wallworm]

Thanks for reporting and sorry for the long delay. The team was on holiday. We will investigate.